Yard Signs Are Powerful & Effective Marketing Tools
In September of 2005, I started an arborculture (tree care) contracting business in New Orleans after hurricane Katrina. In the first couple months after the storm, a lot of our work was with LADOT and FEMA subcontractors. After that, I concentrated totally in the private sector.
Below are yard signs I used in New Orleans and afterwards, in NE Oklahoma. I've also did some billboard advertising that I found was effective also. I've posted those images as well.
Yard Signs, 24'x18'

Yard sign I used in New Orleans after hurricane Katrina

Another sign I've used in NE Oklahoma

And yet another sign I've used in NE Oklahoma

Newest yard sign I'm using in NE Oklahoma tree service
Highway Billboards

First billboard...

Second billboard...